Head to head
Equi-Trek Sonic 3,500kg vs Ifor Williams GD105
The Ifor Williams GD105 is 1,735kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 800kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic 3,500kg weighs 1,735kg more empty.
- Gross weight: the Equi-Trek Sonic 3,500kg is rated 800kg heavier gross.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Ifor Williams GD105 | |
|---|---|---|
| Gross weight | 3500kg | 2,700kg |
| Unladen weight | 2320kg | 585kg |
| Internal bed | - | 3.11m x 1.58m (10ft 2in x 5ft 2in) |
| Brakes | - | Braked |
Sources: Equi-Trek Sonic 3,500kg, Ifor Williams GD105. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
- you want one that is rated 800kg heavier gross
A compact motorised horsebox pitched as easy to drive day to day, for owners of one or two horses who want a small horsebox rather than a trailer and tow car. It is one of Equi-Trek's lower-cost motorised models.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the GD105 if...
- you want one that is 1,735kg lighter empty
The same market as the GD85 with about 60cm more bed length, which is the difference between fitting a load and not. Landscapers and anyone moving long materials or a quad choose it for the length rather than the payload, which is unchanged.
Listed by
- Blendworth Trailers - Rowland's Castle
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Equi-Trek Sonic 3,500kg and the Ifor Williams GD105?
The Ifor Williams GD105 is 1,735kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 800kg heavier gross. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Ifor Williams GD105 is a general duty box trailer, twin axle, longer bed.
Which is lighter, the Equi-Trek Sonic 3,500kg or the Ifor Williams GD105?
The Ifor Williams GD105. It is 1,735kg lighter empty than the Equi-Trek Sonic 3,500kg.
Can I tow the Equi-Trek Sonic 3,500kg or the Ifor Williams GD105 on a car licence?
Yes, as far as the licence goes. Both are rated at or under 3,500kg gross, and a car (B) licence has covered towing up to 3,500kg since 16 December 2021. Your car still has to be rated to tow the loaded weight - check the handbook or the VIN plate.
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